Billie Joe Armstrong has been able to play shows at smaller venues with his side project The Longshot, rather than stadiums frequented by Green Day. Erik Pendzich / REX / Shutterstock
Billie Joe Armstrong has been able to play shows at smaller venues with his side project The Longshot, rather than stadiums frequented by Green Day. Erik Pendzich / REX / Shutterstock
A fresh approach: why musical side projects are about more than just having fun
From Green Day's Billie Joe Armstrong to the Foo Fighters' Dave Grohl, we take a look at why new bands are vital to maintaining the careers of established rock stars